Home / 78,289.44-117,432.64-19,123.52

Finding the Fourth Proportional to 78,289.44, 117,432.64 and 19,123.52

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Solution

The fourth proportional to 78,289.44, 117,432.64 and 19,123.52 is: 28,684.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,289.44 : 117,432.64 = 19,123.52 : x
  2. Step 2: Convert to fraction form
    78,289.44/117,432.64 = 19,123.52/x
  3. Step 3: Cross multiply
    78,289.44x = 117,432.64 × 19,123.52
  4. Step 4: Simplify right side
    78,289.44x = 2,245,725,439.69
  5. Step 5: Solve for x
    x = 2,245,725,439.69/78,289.44
  6. Step 6: Final answer
    x = 28,684.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.